Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates
CB Insights - CB Insights is a company database for the venture capital and corporate development community.
Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.
Tracxn - data on companies
Nylas Mail - The Nylas Cloud API powers your application with email, calendar & contacts features. Built-in features for better email, calendar, and contact management.